Port38/UDP

rap

Port

Protocol

UDP

What is port 38?

Port 38/UDP is a Well-Known port, assigned by IANA for widely recognized services. It is associated with the rap service.

Route Access Protocol

Useful commands

nmapnmap -p 38 -sV example.com

netcatnc -zv example.com 38

curlcurl -v http://example.com:38/

telnettelnet example.com 38

bash(echo > /dev/udp/example.com/38) 2>/dev/null

Firewall commands

UFWAllow

sudo ufw allow 38/udp

Deny

sudo ufw deny 38/udp

iptablesAllow

sudo iptables -A INPUT -p udp --dport 38 -j ACCEPT

Deny

sudo iptables -D INPUT -p udp --dport 38 -j ACCEPT

firewalldAllow

sudo firewall-cmd --permanent --add-port=38/udp

WindowsAllow

netsh advfirewall firewall add rule name="Open Port 38" dir=in action=allow protocol=UDP localport=38

Security Risks

Unauthorized access to the service
Data exposure if the service is unauthenticated
Outdated versions with vulnerabilities
Incorrect service configuration

Frequently Asked Questions

What service runs on port 38/UDP?

Port 38/UDP is associated with the rap service. Route Access Protocol

Is it safe to expose port 38 to the Internet?

It depends on the service and configuration. Port 38 (rap) is a Well-Known port. If you need to expose it, keep the service updated, use strong authentication, and configure a firewall. It's always recommended to restrict access by IP when possible.

How do I check if port 38 is open?

You can use nmap: `nmap -p 38 -sV example.com`, netcat: `nc -zv example.com 38`, or the bash command: `(echo > /dev/udp/example.com/38) 2>/dev/null && echo "Open" || echo "Closed"`.

How do I open or close port 38 on my firewall?

On Linux with UFW: `sudo ufw allow 38/udp` (open) or `sudo ufw deny 38/udp` (close). With iptables: `sudo iptables -A INPUT -p udp --dport 38 -j ACCEPT`. On Windows: `netsh advfirewall firewall add rule name="Open Port 38" dir=in action=allow protocol=UDP localport=38`.